User Menu
Here are the user menu on both English & Chinese, click the link below to learn more.
RF WiFi 110V/220V 1 Channel Smart Switch (KR2201W-4)
RF433mhz 110V/220V 1 Channel Relay Switch (KR2201-4)
RF433mhz 110V/220V 2 Channel Relay Switch (KR2202-4)